Definition of meconium in English:

meconium

noun

mass nounMedicine
  • The dark green substance forming the first faeces of a newborn infant.

    • ‘In 95 percent of newborns, meconium is passed by 24 hours of age.’
    • ‘A common presentation is failure to pass meconium in the first 24 hours coupled with a gradual onset of abdominal distension and vomiting.’
    • ‘Infants who pass thin meconium, which is yellow to light green and watery, are more likely to be healthy at birth.’
    • ‘Urine samples were collected from the women and meconium samples were collected from each baby.’
    • ‘The question as to why some infants may discharge meconium in times of stress and other infants do not has not been well studied.’

Origin

Early 18th century: from Latin, literally ‘poppy juice’, from Greek mēkōnion, from mēkōn ‘poppy’.

Pronunciation

meconium

/mɪˈkəʊnɪəm/